Segmentation method and method for signaling segmentation of a coding tree unit

2. The decoding method as claimed in claim 1, in which, at least one item of information of reconstruction of said second part with m sides corresponds to some values of prediction pixels which are stored in the decoding device.

3. The decoding method as claimed in claim 1, in which said at least one item of information of reconstruction of the second part with m sides of the current block is representative of an act of not subdividing said second part with m sides of the current block.

4. The decoding method as claimed in claim 1, in which said act of reading comprises reading, in the data signal, an item of information indicating whether the current block is intended to be subdivided into said first and second parts or else according to another predetermined method.

5. The decoding method as claimed in claim 1, in which said act of reading comprises reading, in the data signal, an item of information indicating a given subdivision configuration of the current block into said first and second parts, said configuration being selected from various predetermined subdivision configurations.

7. The decoding method as claimed in claim 1, in which a subdivided current block contains at most a part having a geometrical form with m sides.